Senior Full-stack Developer, Python / FastAPI, React & SQL

Description

We are launching a new multi-cloud product and need a Senior Full-stack Developer to own full-stack delivery from Python/FastAPI APIs to React/TypeScript UI. You will optimize PostgreSQL and OpenSearch performance and collaborate in a Databricks-heavy environment. Apply today. Responsibilities Develop and enhance web applications using Python/FastAPI and SQL Define and implement APIs and integrations that support high-load database operations Optimize and troubleshoot query performance in production systems Deliver front-end work using TypeScript and React Incorporate GenAI engineering tools to improve development workflows Work collaboratively while independently owning assigned tasks Maintain proactive communication with stakeholders and teammates Own features end to end and contribute beyond ticket completion Execute effectively through ambiguity in a fast-paced startup environment Requirements Demonstrated 5+ years of production delivery with Python, FastAPI, and SQL Advanced knowledge of web application development, API design, and integration work Hands-on ability to operate high-load databases and optimize query performance Familiarity with TypeScript and React and willingness to work across the full stack Practical experience with GenAI engineering tools, ideally Claude Code Strong communication abilities and proactive ownership, comfortable working solo and with a team Track record of navigating ambiguity and shipping without constant direction in a transparent, fast-moving startup environment English proficiency at B2 (Upper-Intermediate) level or higher Nice to have Experience with TypeScript, React, Next.js, Storybook, Playwright, Radix UI, and Zustand Experience working with PostgreSQL and OpenSearch Knowledge of cloud platforms, Infrastructure as Code, and related tools Data engineering experience using PySpark and SparkSQL Client-facing experience

Requirements

• Demonstrated 5+ years of production delivery with Python, FastAPI, and SQL

• Advanced knowledge of web application development, API design, and integration work

• Hands-on ability to operate high-load databases and optimize query performance

• Familiarity with TypeScript and React and willingness to work across the full stack

• Practical experience with GenAI engineering tools, ideally Claude Code

• Strong communication abilities and proactive ownership, comfortable working solo and with a team

• Track record of navigating ambiguity and shipping without constant direction in a transparent, fast-moving startup environment

• English proficiency at B2 (Upper-Intermediate) level or higher

Responsibilities

• Develop and enhance web applications using Python/FastAPI and SQL

• Define and implement APIs and integrations that support high-load database operations

• Optimize and troubleshoot query performance in production systems

• Deliver front-end work using TypeScript and React

• Incorporate GenAI engineering tools to improve development workflows

• Work collaboratively while independently owning assigned tasks

• Maintain proactive communication with stakeholders and teammates

• Own features end to end and contribute beyond ticket completion

• Execute effectively through ambiguity in a fast-paced startup environment

Seniority

• Senior

Nice to have

• Experience with TypeScript, React, Next.js, Storybook, Playwright, Radix UI, and Zustand

• Experience working with PostgreSQL and OpenSearch

• Knowledge of cloud platforms, Infrastructure as Code, and related tools

• Data engineering experience using PySpark and SparkSQL

• Client-facing experience